Will The ‘Big Bang Theory’ Series Finale Finally Reveal Penny’s Last Name?

It is unclear what will be revealed during the special, though it is safe to say that Cuoco will keep Penny’s last name a tightly guarded secret.Cuoco added that her co-star, Johnny Galecki, has long maintained that Penny’s real last name is actually Hofstadter, which a reference to his character, Leonard. It is unclear if the series ever gave Penny a last name in the first place.Following the special, the cast of the show will make an appearance on The Late Show With Stephen Colbert. The series finale of The Big Bang Theory airs May 16 on CBS.